Who owns MAC prefix 0011CF?

0011CF is registered to Thrane & Thrane A/S in the IEEE MA-L registry.

What devices use 0011CF?

Any network device with a MAC address starting 00:11:CF was manufactured by or for Thrane & Thrane A/S.

MA-L · OUI prefix

Thrane & Thrane A/S

Any MAC address starting 00:11:CF is registered to Thrane & Thrane A/S in DK.

OUI prefix	0011CF
Vendor	Thrane & Thrane A/S
Registry	MA-L (24-bit, large block)
Country	DK
Example MAC	00:11:CF:00:00:00

What this means

The IEEE assigned the MA-L block 0011CF to Thrane & Thrane A/S. Every network interface they manufacture under this block has a MAC address beginning with these digits, followed by a unique per-device identifier. If a device on your network shows a MAC starting 00:11:CF, it is Thrane & Thrane A/S hardware.

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